A declining Industrial Town has proposed to improve water sustainability by reducing stormwater runoff through change of land use land cover (LULC), as shown in the Table below, to attract new residents. LULC Runoff Coefficient Existing Area in hectare Proposed Area in hectare Industrial 0.7 1500 800 Residential 0.5 1000 1200 Park and Playgrounds 0.25 1200 1000 Forest 0.15 300 1000 Considering a flat topography and zero additional runoff from the adjoining areas, the reduction in run-off generation for a 400 mm rainfall event in the industrial town for the proposed intervention, in cubic meters, is _____ $\times 10^6$ (rounded off to two decimal places).

Question

A declining Industrial Town has proposed to improve water sustainability by reducing stormwater runoff through change of land use land cover (LULC), as shown in the Table below, to attract new residents. LULC Runoff Coefficient  Existing Area in hectare Proposed Area in hectare  Industrial  0.7  1500  800 Residential  0.5  1000  1200  Park and Playgrounds  0.25   1200 1000 Forest   0.15   300  1000 Considering a flat topography and zero additional runoff from the adjoining areas, the reduction in run-off generation for a 400 mm rainfall event in the industrial town for the proposed intervention, in cubic meters, is  _____  $\times  10^6$   (rounded off to two decimal places).

cdquestions Admin · Accepted Answer

The correct answer is : 1.30 to 1.38

Correct Answer: 1.3

Solution and Explanation

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LULC	Runoff Coefficient	Existing Area in hectare	Proposed Area in hectare
Industrial	0.7	1500	800
Residential	0.5	1000	1200
Park and Playgrounds	0.25	1200	1000
Forest	0.15	300	1000